Move IdentityMapKeyError under Twitter::Error namespace

lib/twitter/base.rb

@@ -1,4 +1,5 @@
 require 'twitter/core_ext/kernel'
+require 'twitter/error/identity_map_key_error'
 
 module Twitter
   class Base
@@ -39,7 +40,7 @@ def self.fetch(attrs)
         return object
       end
       return yield if block_given?
-      raise Twitter::IdentityMapKeyError, 'key not found'
+      raise Twitter::Error::IdentityMapKeyError, "key not found"
     end
 
     # Stores an object in the identity map.

lib/twitter/error/identity_map_key_error.rb

@@ -0,0 +1,9 @@
+require 'twitter/error'
+
+module Twitter
+  class Error
+    # Inherit from KeyError when Ruby 1.8 compatibility is removed
+    class IdentityMapKeyError < ::IndexError
+    end
+  end
+end

lib/twitter/identity.rb

@@ -1,4 +1,5 @@
 require 'twitter/base'
+require 'twitter/error/identity_map_key_error'
 
 module Twitter
   class Identity < Twitter::Base
@@ -12,7 +13,7 @@ def self.fetch(attrs)
       end
 
       return yield if block_given?
-      raise Twitter::IdentityMapKeyError, 'key not found'
+      raise Twitter::Error::IdentityMapKeyError, "key not found"
     end
 
     # Stores an object in the identity map.

lib/twitter/identity_map.rb

@@ -19,8 +19,4 @@ def store(id, object)
 
   end
 
-  # Inherit from KeyError when Ruby 1.8 compatibility is removed
-  class IdentityMapKeyError < ::IndexError
-  end
-
 end

spec/twitter/base_spec.rb

@@ -22,7 +22,7 @@
       it "raises an error on objects that don't exist" do
         lambda {
           Twitter::Base.fetch(:id => 6)
-        }.should raise_error(Twitter::IdentityMapKeyError)
+        }.should raise_error(Twitter::Error::IdentityMapKeyError)
       end
     end
 

spec/twitter/identifiable_spec.rb

@@ -19,7 +19,7 @@
     it "raises an error on objects that don't exist" do
       lambda {
         Twitter::Identity.fetch(:id => 6)
-      }.should raise_error(Twitter::IdentityMapKeyError)
+      }.should raise_error(Twitter::Error::IdentityMapKeyError)
     end
   end